This name seems rather common.I don't know if the following
information may help you. There were 5 KUJAWSKI deported >from France
during WWII. There is a POT on the site of Yad Vashem for one of them
and for his sister, but I couldn't find the name of his sister among
the Jews deported >from France. There are currently about 20 KUJAWSKI
in the French directory, and according to the index of French
naturalisations, 19 KUJAWSKI asked for the French nationality between
1900 and 1950.

Eve Line Blum-Cherchevsky
Besancon (France)
and also
Cercle de Genealogie Juive (International JGS in Paris)
http://www.genealoj.org